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Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Components Of Net Periodic Pension Cost
The components of net periodic pension cost of the UK Plan for the three and nine months ended September 30, 2014 and 2013 were as follows (in thousands): 
 
For the three months ended September 30,
 
For the nine months ended September 30,
 
2014
 
2013
 
2014
 
2013
Interest cost
$
3,510

 
$
3,044

 
$
10,573

 
$
9,147

Expected return on plan assets
(4,226
)
 
(3,549
)
 
(12,729
)
 
(10,664
)
Amortization of unrecognized loss
508

 
633

 
1,530

 
1,902

Net periodic pension (income) expense
$
(208
)
 
$
128

 
$
(626
)
 
$
385